4GET4N

Would like to get some more info from an owner. I have not found enough info online to support my findings. A few people talk about the subject but there is conflicting info on it...

Would love to ask a real owner some questions. I am in the process of tracking down original owners cause I have zero documentation on my 1965 Black Big Block Option delete car with 456posi....

The original transmission is there with the numbers to match but not sure if the gears have been changed at one point. I took the side casing off and took pictures and video of this. The shop that helped me knew nothing about it and I was sent to a specialist (he was suppose to be the best in the area) who rebuilds Muncies and knows every model. All I got from him is there were no Vettes in "65" with M22's.

Anyways, if anyone can help with this, that would be great.

DZAUTO

Did you read the comments the last time this issue was raised (very recently) about 65 M-22s??????
If not, do a search.
If so, that's probably some of the best info.
With the exception of the input spline count and size of the tail shaft, they're all going to be the same internally.
During the different year models, they are all (M20-M21-M22) going to share the SAME casting numbers on the main case, same on the tail housing, same on the side cover and same on the mid plate.

4GET4N

I'm getting conflicting reports with the numbers and if they are suppose to have a drain plug or not...I think the only two real ways to answer my questions is to ask somebody that has one of these cars or to find docs which will be almost impossible.

69ttop502

I remember reading a feature in a magazine about a 65 396 car that had a factory M-22. I think the article said there were less than 20 but they did exist, but only in big block cars.

Bill

JohnZ

There's no conflict about the numbers - as DZAUTO noted, the castings are the same regardless of the internals, and the M22 was the ONLY Muncie that had a drain plug until 1970, when all Muncies got a drain plug (although some rebuilders added them as a convenience for the customer - the boss was always there).

DZAUTO

I've been building 4spds (mostly Muncies) for 40+yrs.
As John just pointed out above, M22s were the only versions (until 70) to get a drain plug. I've also pointed out previously that I drill/tap/install a magnetic drain plug in all Muncie rebuilds (unless the owner specifically declines).
Up through 70, all Muncies (except M22s) had a magnetic donut glued to the bottom of the case. If that donut EVER comes loose, bye-bye Muncie guts! And I'm not the only Muncie rebuilder that installs a drain plug. Wally Knight (Muncieman), right here also installs some.
Soooooooooooo, it is entirely possible that you may run across an M20 or M21 with a drain plug that's been added by someone like me.
Oh ya, does that glued-in magnet ever come loose? Check the pictures I took not too long ago of a ruined (was a perfectly good tranny) Muncie!

This glob, and metal particles, WAS a donut magnet.


And here is the remains of the Muncie it destroyed after coming unglued from the bottom of the case!


Does this scare you? It should. Does it happen very often? Rarely, but you see what the result can be if it does!

vettn

Call or email Al Grenning in Boonville, NY. He has done extensive research on M22's in vettes. Algrenning@aol.com

midstyle

What about a link to the still pics (forget the video) ? And posting the numbers would help us respond. [Assy. date, cast and stamped #'s]

AFAIK, the only other 396 M22 Corvette that's known and well documented is now in a Seattle area collection. (ref. A. Colvin's '65-69 Chev-by-the-Numbers appendix).

In theory, the Corvette M22 installations were not limited to only BB's.

There are probably machining, patina and inspection marks (paint dabs and stamps) differences between original United Delco gears and those of more recent reproductions -- foreign or otherwise. So give us a few close-up pics. I could offer same on gears from an original March '69 M22 trans.

Wayne

John BX NY

Gary is correct. Al Grenning did a comprehensive story on this subject in the NCRS Restorer some years ago. That would be the first place to start.

5speeds

There are 1965 and earlier M22 transmissions..... I have come across factory M22 countergears for use with 7/8 countershafts. Although the 65 vettes were suppose to have the 3851325 case punched out for the 1 inch shaft these 7/8 ones could go be spares from the 63 Grande Sport Program.

If you have a 65 M22 the 3851325 casting numbers would have been milled off since the case was altered. When a case was altered by the factory the numbered were milled off as part of procedure as not to confuse altered parts with standard production parts. These units were built starting from April 15, 1965.

You fail to send links of pictures and video.... please do.

Also in regards to aftermarket numbers. Typical Perfection Hy-Test ( Zoom) gears used the T312 numbering system. They made m22 gears. Borg Warner and the Newer Masiero gears use the WT297 numbering system.

Paul
www.5speeds.com

4GET4N

I also have video too but I have to clear off more space to upload the files to my pc...

Here is what I have so far, the numbers are 351325 and the Tail housing reads 3857584...

I was unaware that my Hi-def video camera took pretty decent pics too.






I wish you can hear the knuckle breaking sounds of it going into gear and the loud whining when I drive it...Will get that up soon too...

http://www.yearone.com/updatedsingle...ages/m20.a.jpg

FASTZ

is your vin number stamped on the case? apparently you do not have any documentation showing that this car came with an M22.That would be much stronger evidence then what you keep asking about

vintagecorvette

Is it my computer screen or does the one gear look to be a bit rusty?

BarryK

I'm seeing the same thing

4GET4N

The car has been sitting for over 20 years. I know this is the first time I have ever opened the case in the last 25 years. It probably could use a rebuild...

Yes, this is the cars tranny. The date on it matches the rest of the car and rear end too...

I do not think anyone has answered my original question though.

4GET4N

Next is to start tracking down the previous owners of my vette and see if I can get lucky with any sort of documentation...

FASTZ

dated?? does the tranny have the serial number of the car stamped in it? the cases and tail shaft are not dated.The part numbers that you listed for the main case and tail shaft were the same on all of the muncies for that year

FASTZ

FASTZ

what exactly is your original question?

62Jeff

Psst - I think if we don't own an M22 in a 65, we aren't allowed to contribute to the thread.